critical point of water is that point on the pressure-volume phase diagram of the water,above which there will be no line of the equilibrium between liquid and gas phase.
That means that above this pressure it is not possible to get liquid again by increasing the pressure of the mixture.if we will do so then it will get converted to subcritical fluid i.e.a highly compressed gas. This happens because the interatomic forces at that presure are much more then the forces because of pressure that are trying to change the state of the gas.
the values for water are 218 ATM pressure and 374 centigrade..
i hope datas are correct:)
Latent heat of water is the heat required to change its state at a particular temperature BECAUSE of the pressure at which the water is at at the point of fusion or evaporation.The latent heat is not affected by temperature (in fact there is no temperature change during absorption of latent heat) it is affected by the pressure acting on a substance. As the pressure increases, the latent heat (of evaporation) decreases, consequently with the change in pressure there is also a different temperature at which the evaporation takes effect, higher pressure, higher temperature at the evaporation point.
latent heat
The latent heat of vaporisation of water requires more energy. This is because on melting, the intermolecular bonds in water are only weakened whereas on boiling, the bonds are completely broken, which requires a larger amount of energy.
the answer is latent Latent heat is correct, but specifically the latent heat of evaporation of (whatever is evaporated, in this case water) water. When the evaporated water condenses, it releases this latent heat as it precipitates, which is why it tends to feel warmer during rainstorms (unless the water is running down your neck in which case it feels horrible).
The water has already reached the 212 degree boiling point. At 212 degrees the water can exist as either a liquid or a vapor. Absorbing the latent heat pushes liquid to the vapor state without any change in temperature.
Its the temp AND pressure at which there is no difference between the liquid water and the vapor (steam) for water that is - around 647 K (374 °C; 705 °F) and 22.064 MPa (3200 PSIA or 218 atm)
Boiling water has a lower latent heat than steam. Steam is the transition from liquid to gas for boiling water. If by boiling water you mean liquid water at the temperature of 100 degrees Celsius then yes, steam has a higher latent heat.
Latent heat of water is the heat required to change its state at a particular temperature BECAUSE of the pressure at which the water is at at the point of fusion or evaporation.The latent heat is not affected by temperature (in fact there is no temperature change during absorption of latent heat) it is affected by the pressure acting on a substance. As the pressure increases, the latent heat (of evaporation) decreases, consequently with the change in pressure there is also a different temperature at which the evaporation takes effect, higher pressure, higher temperature at the evaporation point.
When water vapor is cooled to its dew point, the heat energy is released as latent heat, causing the water vapor to condense into liquid water. This latent heat is the energy required for the phase change from gas to liquid, and is released back into the surrounding environment during condensation.
Latent heat of the ice, liquid water has no latent heat reserves. Perhaps at freezing we should call it "latent cold" but thermodynamics has always referred to it as latent heat whether at boiling or freezing. +++ It is latent heat because the water (liquid or ice) at freezing-point (0ºC) still contains heat energy as its temperature is at about 217ºK.
In this first heat boil the water at its boiling point that is 100 degree Celsius, when the temperature is reached then heat supplied to water not boils the water it is used to change the state of the matter means heat is used to overcome the forces of attraction to change its state and the heat is latent heat of vaporisation.so this is latent heat (hidden heat) which not increase the temperature for some time.
Latent heat of vapourisation can be define as the rate by which water is heat to vapourise, it has a difference with evaporation because evaporation occurs directly when the water start heatin while vapourisation always start in a specific temperature
Latent heat is the energy absorbed or released during a phase change, such as when water evaporates or condenses. In the atmosphere, when air cools and reaches its dew point, water vapor condenses, releasing latent heat and warming the surrounding air. Conversely, when air warms and evaporates water, it absorbs latent heat and cools the surrounding air. This process affects the temperature and stability of the air mass.
Latent heat of evaporation of water to steam is 2270 KJ/Kg
In the atmosphere latent heat is a property of water vapour. When water vapour condenses it releases latent heat, and latent heat must be supplied to evaporate liquid water. This heat affects the behaviour of the weather. Similar effects occur in the change from liquid water to ice and vice versa.
latent heat
The energy which must be transferred to or from a sample of water in order to change it's state is called the Latent Energy or Latent Heat - for example Latent Heat of Evaporation or Latent Heat of Freezing.